Particle scavenging in the upper water column off Mindoro Island, Philippine:: 234Th/238U disequilibria

被引：6
|
作者：
Wei, CL [1 ]
Hung, CC [1 ]
机构：
[1] Natl Taiwan Univ, Inst Oceang, Taipei 10764, Taiwan
来源：
ESTUARINE COASTAL AND SHELF SCIENCE | 1998年 / 46卷 / 03期
关键词：
thorium-234; scavenging; vertical fluxes; Philippine;
D O I：
10.1006/ecss.1997.0297
中图分类号：
Q17 [水生生物学];
学科分类号：
071004 ;
摘要：
Vertical profiles of dissolved and particulate Th-234 in the upper water column of four stations in the narrow channel adjacent to Mindoro Island, Philippine were determined during November 1991. Calculated from the degree of disequilibrium between particle-reactive Th-234 and soluble parent, U-238, the residence times of dissolved and particulate(234)Th range from 20 to 42 days and from 9 to 17 days, respectively. Vertical Th-234 fluxes of 4300-7000 dpm m(-2) day(-1) from the upper 200 m are required to balance the deficiency of Th-234. (C) 1998 Academic Press Limited.
引用
收藏
页码：351 / 358
页数：8
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